diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 21360ed..d85a475 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: ['3.9', '3.10', '3.11']
+        python: ['3.11', '3.12']
         django: ['3.2', '4.0']
     name: Run the test suite (Python ${{ matrix.python }}, Django ${{ matrix.django }})
 
@@ -51,7 +51,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.9'
+          python-version: '3.11'
 
       - name: Build sdist and wheel
         run: |
diff --git a/README.rst b/README.rst
index 21ffc6e..bf50d84 100644
--- a/README.rst
+++ b/README.rst
@@ -6,7 +6,7 @@ Open Forms Client (for Django)
 :Version: 0.4.0
 :Source: https://github.com/open-formulieren/open-forms-client-django
 :Keywords: Open Forms, Client, Django
-:PythonVersion: 3.9 - 3.11
+:PythonVersion: 3.11+
 :DjangoVersion: 3.2 - 4.0
 
 |build-status| |code-quality| |black| |coverage|
@@ -37,7 +37,7 @@ Installation
 Requirements
 ------------
 
-* Python 3.9 or newer
+* Python 3.11 or newer
 * Django 3.2 or newer
 
 
diff --git a/tox.ini b/tox.ini
index f5fef70..52ce832 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 envlist =
-    py{39,310,311}-django{32}
-    py{39,310,311}-django{40}
+    py{311,312}-django{32}
+    py{311,312}-django{40}
     isort
     black
     flake8